Does he need to do anything other than amend his taxes?

First of all the police don't haul you off to jail for tax evasion and it takes the IRS about 2 plus years to investigate criminal matters. He will...

Why do I pay income tax for monatary amounts i've paid in taxes from the employer for years of service?

I am not really sure what you are referring to. Earned income is only subject to income tax one time.

Which parent is allowed to claim the child on his/her taxes?

If the child lives with you, you have the right to claim the child unless you waive it with a form 8332

No. Gifts are not income and do not have to be reported by the recipient. The giftor may have to pay taxes or file for an exclusion with a gift...

What legal steps can I take if non-custodial parent owes back child support in the amount of $12,000 but is not filing taxes?

Whether or not he files tax returns is between him and the taxing authorities. If he is working and getting a W-2, then he is either filing taxes...

Can I use self employment tax deductions for health insurance?

Yes, there are steps you need to follow to do it correctly

You can amend the return to married filing separate. You can wait for the IRS to correct it and send you a bill if you are going to owe taxes. The...

Is 1099-C student debt forgiveness from deceased husband taxable. Is it reported on 1040 or 1041.

There are ways around this, but whatever you do, do not file a joint return in the next week. File an extension. Contact a tax professional, like...

Used a untrustworthy accountant for my taxes last year, received a CP2000 notice from the IRS today for $8000. What do I do next

Yes you can enter into payment plan. You can get a plan for as little as about $120.00 per month. You will continue to accrue penalties and...

Amend my tax return to change filing status?

Yes you can amend from separate to joint. Most states require the same filing status as the federal.